I used tobe on NA and they had a section where you could put timewasters details and numbers in and you could do a check,is there anything on here like that?

Yes.

While we cannot post full numbers of timewasters/worse on this forum (it counts as sharing personal details and could get us in a lot of trouble), members can post numbers in the following format: 012345678**

So if you have someone calling you from, say, a number that starts with 077276591**, you could then put the first part of that number into the search form and find out just why you don't want to be taking his calls.